fix: readme

README.en.md

@@ -31,10 +31,9 @@ A simple, open source [bilingual translation extension & Greasemonkey script](ht
   - `Alt+Q` Toggle Translation
   - `Alt+C` Toggle Styles
   - `Alt+K` Open Setting Popup
-  - `Alt+B` Open Translate Popup
+  - `Alt+S` Open Translate Popup / Translate Selected Text
   - `Alt+O` Open Options Page
   - `Alt+I` Input Box Translation
-  - `Alt+S` Translate Selected Text
 
 ## Install
 

README.md

@@ -31,10 +31,9 @@
   - `Alt+Q` 开启翻译
   - `Alt+C` 切换样式
   - `Alt+K` 打开设置弹窗
-  - `Alt+B` 打开翻译弹窗
+  - `Alt+S` 打开翻译弹窗/翻译选中文字
   - `Alt+O` 打开设置页面
   - `Alt+I` 输入框翻译
-  - `Alt+S` 翻译选中文字
 
 ## 安装